So, giving props to another player on this but told me I could reference this (Thanks Crack)

1. Download Modio which can be found by simply typing Modio in Google2. Once installed go ahead and find yourself 4 pics and save them to your desktop3. Open up Modio 4. In the upper left corner click the Modio symbol (M)5. A menu will open and look to the lower right and hover over other tools6. Click Theme Creator7. Now just place your photos in the boxes of your choice8. Save to Device9. Plug Device to xbox 10. Upload and enjoy